The crankbros M19 is probably the best multi-tool on the market. The chain tool is very easy to use and works very well. I've used mine to rejoin a chain after quick-link failure 4 times in the past 3 years. Most recently this last Sunday when my quick-link separated during a shift and I could only find half.

That bell tool also has a weird spoke nipple/gauge right where you will be putting the most force with your hand when twisting to push out a rivet so it will be very uncomfortable.